If you want 3300 from 200AB's you might still consider the 300 Tommy with a 30-32" barrel. I think dies run ~$100 from Ray Romain. I talked to him awhile back about this and can't remember for sure. Give him a call at 814-265-1948. Keep in mind that he told me that he won't make a Tommy without at least a 30" barrel and brake installed. So about 32" min. overall barrel length. Otherwise, he says, you're just burning extra powder with a shorter length and he says that you need the brake to shoot it accurately. I couldn't convince him to do a 28-30" barrel with out brake. But call Ray and get the price on the dies. It might not be as bad as you think and having a one-off wildcat is kinda cool anyway, I think. Ray told me that you can expect about an extra 100fps from the Tommy over a similarly barreled 300RUM-no more. I don't recall him mentioning the bullet weight he had in mind when he stated that number.
I just think if you're going to all that trouble anyway and only have to spend another $100 or so extra for dies, have Ray put a 30" braked barrel, do the Tommy and be done with it. You'd have a cannon. I'm doing my own RUM Imp. with straight wall case and .270 neck on a 40 degree shoulder and .539 at the shoulder called the 300RUMBO. It's gonna be a barrel burner and I'm really hoping the new Hodgdon powder, US869, will give me the velocity I want and help with barrel erosion. The Tommy has a .286 neck 35 degree shoulder and is not quite as fat as my design at the shoulder, if I recall correctly. I'm looking at $400 for custom die reamer, custom Redding bushing FL die and seater. Thought I might get by without the custom seater and could use the 300RUM seater but Pat Ryan at Redding says the dimensions of the my 300RUMBO won't allow it. Arrggh...more money...
Have fun.
